Reportable Segments Reportable Segments EBDA (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
DD&A	$ (565)	$ (593)
Amortization of excess cost of equity investments	32	21
General and administrative and corporate charges	(153)	(154)
Interest, net	(436)	(460)
Income Tax Expense	(60)	(172)
Net (Loss) Income	(291)	567
Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	967	1,974
Corporate and intersegment eliminations
Segment Reporting Information [Line Items]
DD&A	(565)	(593)
Amortization of excess cost of equity investments	32	21
General and administrative and corporate charges	(165)	(161)
Interest, net	(436)	(460)
Income Tax Expense	(60)	(172)
Natural Gas Pipelines | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	1,196	1,203
Products Pipelines | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	269	276
Terminals | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	257	299
CO2 | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	(755)	198
Kinder Morgan Canada | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBDA	$ 0	$ (2)